<SEC-DOCUMENT>0001188585-15-000001.txt : 20150303
<SEC-HEADER>0001188585-15-000001.hdr.sgml : 20150303
<ACCEPTANCE-DATETIME>20150303170923
ACCESSION NUMBER:		0001188585-15-000001
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20150228
FILED AS OF DATE:		20150303
DATE AS OF CHANGE:		20150303

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			DUPONT E I DE NEMOURS & CO
		CENTRAL INDEX KEY:			0000030554
		STANDARD INDUSTRIAL CLASSIFICATION:	PLASTIC MATERIAL, SYNTH RESIN/RUBBER, CELLULOS (NO GLASS) [2820]
		IRS NUMBER:				510014090
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1007 MARKET ST
		CITY:			WILMINGTON
		STATE:			DE
		ZIP:			19898
		BUSINESS PHONE:		3027741000

	MAIL ADDRESS:	
		STREET 1:		1007 MARKET ST
		CITY:			WILMINGTON
		STATE:			DE
		ZIP:			19898

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			CUTLER ALEXANDER M
		CENTRAL INDEX KEY:			0001188585

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-00815
		FILM NUMBER:		15670162

	MAIL ADDRESS:	
		STREET 1:		EATON CENTER
		STREET 2:		1111 SUPERIOR AVENUE
		CITY:			CLEVELAND
		STATE:			OH
		ZIP:			44114
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2015-02-28</periodOfReport>

    <issuer>
        <issuerCik>0000030554</issuerCik>
        <issuerName>DUPONT E I DE NEMOURS &amp; CO</issuerName>
        <issuerTradingSymbol>DD</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001188585</rptOwnerCik>
            <rptOwnerName>CUTLER ALEXANDER M</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1007 MARKET STREET</rptOwnerStreet1>
            <rptOwnerStreet2>D-9000</rptOwnerStreet2>
            <rptOwnerCity>WILMINGTON</rptOwnerCity>
            <rptOwnerState>DE</rptOwnerState>
            <rptOwnerZipCode>19898</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2015-02-28</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>503.1085</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>77.85</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>48426.7383</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Includes direct ownership, unvested RSUs and vested deferred stock units and is adjusted to reflect the transaction reported on December 2, 2014 which was not carried forward in the total on the Form 4 filed on December 16, 2014.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Erik T. Hoover by Power of Attorney</signatureName>
        <signatureDate>2015-03-03</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
